Contact for screw-plug fuses.



W. KLEMBNT, E. KOHRS & 0. LEIGHTBNSGHLAG.

CONTACT FOR SCREW PLUG FUSES APPLICATION FILED AUG. 2 1910.

1,054,212, Patented Feb. 25, 1913.

LEIQHTEl-ISCHLAG, 01* CHARLOT'IENBE'EG, GEIEEEMNY,

ASSIGITGRS TO SIEMENS- SGHUCKERTWERKE G. M. B. 1-1., OF BERLIN, GERMANY, A GORPORATEGZW 013 GER- l f'iAlifY.

Application filed August 2 To (/7? whom it may concern:

le it lrnoun that we, lliiinumi Knnirunr, rcn fling at Kcii-l inkcnltrug-ldulltcnhnin and" Emu Konns and CARL lninrnrnxscnliiu. residing at .Churlottenhurg, Gerri 1y :suhjc-zs of the German Emperor have inventcd certain new and useful Improvements in Cork tacts for Scrcw-Pl'ug l use: .)f which the following is a specification.

This invcntion relates g'cncrully to screw plug fuses and particularly to those Jill hcuv currents. and u priniury object is to provide a good leciricul connection hetivcen the foot contacts of the fuse which cuni'iot be obtained with the Well-known rigid contact surfaces on account of these surfaces being made inexactl To this end our improve-(l foot contact comprises a plurality of annular, concentric, sheet-metal rings which are slit at their edges and as a whole form a contact brush. in contract may be arranged desired on the fuse lug itself or on the contact bar.

Three illustrative embodiments of our invention in the form of foot contacts attached to the contact bar of tuse plugs are represented by way of cxumplcjn the accoinpanying drawing, wherein Figures 1 and 2 are elevation partly in section, and plan VlEW' of the footcontact only, respectively, showing a foot contact composed of dishsliaped sheet'inctal rings;

Figs. 3 and l are like views respectively, showing a modified form 05? foot contact, 5 and 6 arc like views, respccshowing another modiue'l con- 1 ti. 4

"inferring firstly to I i. and the t contact here shown comprises a plu-' rality of dish-shaped, concentric,sneet-inctul rings a secured by means of a screw Z) on the contact bar 0. The bottom and top faces of the conical edges of the individual rings or dishes 6:, which directly electrically conncct the plug and the cont-act bar a, serve for transmitting the current.

3 and 4 show a foot contactcom prising a plurality of conical, cone-anttic sheet-metal rings e.

Figs. 5 6 show a foot contact comprisin conical, sheet-metal rings 7' provided with cylindrical lugs 9. These lugs are for keeping the rings central. The individual Specification cf Letters Eutezit.

, 3,815). Serial ll'c. 575,179.

CGNTXLCT FDR SCREW-YLUG FUSES.

rings are provided with slits 7a in their conical edges for making; tl'lGH. elastic, They are arranged, readily revoluble so that when the screw plug is screwed in they can move with it and thcreby Keep the places oi contact clean.

1., A screw plug fuse having a contact face adapted to move 'at right angles to its plans when the plug is screwed in place, a fixed foot contact comprising a plurality of concentric elastic sheet metal rings forming withtheir outer ends a straight contact surface parallel to the contact face of said screw plug and adapted to electrically coni tact with said face when the plug is screwed in place.

2. A screw plug fuse having a, contact face adapted to more at. right angles to its plane when the plug is screwed in place, a fixed foot contact comprising a plurality of concentric elastic substantially conical sheet metal rings forming with their outer ends a straight Contact surface parallel to the contact face of said screw plug and adapted to electrically contact with said face When the plug is screwed in place.

3. In a screw plug fuse, a foot contact, comprising a plurality of concentric lclastic, conical slicet-metul rings having cylindrical lugs.

4. A screw plug fuse having "a'contact as face adapted to move at right angles to its plans when the plug is screwed in place, a lizctl foot contact comprising a plurality oi concentric elastic substantially conical sheet. metal rings forming with theirouter cnds an annular contact surface parallel to the, contact time of said screw plug and adapted to electrically contact with said face when the plug is screwe in place, and a screw centrally arranged Within said for attaching said foot contactto its support. 7

En testimony whereof we have signed our names-to this specification in the presence of two Witnesses.

WILHELM KLEMENT. EMIL KOHRS.

CARL LElCl-ITENSCHLAG.

Witnesses:

Worusrmn HAUPT, HENRY HASPER.

domes of this cutest may in: c'biulncil for five cents each, by addressing the Gcmmlealoner of Patents, 

